has the latest. >> issue was a very nice young lady. >> reporter: john nguyen shared garage space with the victim, who lived with her young son in this apartment on first street and died in the parking lot after being stabbed multiple times by her ex boyfriend with what witnesses described as a butcher knife. >> i think that i've seen this guy before. >> reporter: this was that same parking lot friday evening as heavily-armed police scoured the neighborhood for the killer, who was seen jumping a fence and escaping on foot. video from our helicopp with abc 7 nes shows squads of police, their guns drawn, going door to door in search of a man later identified as 29-year-old juan ramirez whom they say was stalking sandra cruces gonzales, his former girlfriend. >> we have determined that their relationship ended about two years ago but he has been stalking her. >> reporter: police say gonzales had obtained a restraining order to keep ramirez away but a friend says he rebuffed her efforts to part ways and that friday was not the first time he had made unwelcome visits to her apartment.